Welding torch



April 18, 1933.

WELDING TORCH Filed Sept. 24. 1931 Havold Marg,

2 27 2J brg zdf/07 a Their* Attorney.

H. w. ToBEY ET AL 1,904,104

mesas Apr. is, icas: a

UNITE-,D1 s'rn'rizs PATENT orFicE l may w. 'rom um mom v. nir, or`rma-mn, Assisnons 'ro o mornin conm, a concurren oir m You w'nrmnrei'oncii Y Anuncian mea september ai, im. semi in. mm.

Our invention relates to welding, and which Fi 1 is a sideiview,partlyin section,

more articularly to an im roved weldindg of a wel ing head containing atorch contorch ibr gas-arc welding. n gas-arc wel structed. inaccordance with our invention;

ing` the welding operation is performed Fig. 2 is a di ammatic sectionalyview of 5 through the agency of an electric arc and a the nozzle mem rsof the weldinltorch of 58 gaseous medium supplied to and about the Fig.1, and Fig. 3 is aside View of, e central are. nozzle member of Fi 2.

Our invention is particularly applicable In Fig. 1 the welding torchisienclosed to the utilization of the heating effects of Within abox-like container 1 'whichis supflames of atomic h drogen. "Anatomichyported on a vertical member 2 forming part '60 dro n flame mayproduced by dissociat- 0f an automatic arc welding machine. The

inggieydrogen through the agency of en elecconstruction of themachineitself has not tric arcand then allowing the dissociated beenillustrated in the drawing since any hydro en to recombine or bum Uponmachine by means of which the work and the recom ination the atomichydrogen liberwelding torch are traversed relativel to one 68 ates anenormous amount of heat which may another along the seam to be wel edwill be used for welding or like operations. The prove satisfactory. Theweldin torch comutilization of such'atomic hydrogen dames prises aplurality of electrode hoders 3 and 4 is disclosed and claimed broadlyin the cofor .holding electrodes 5 and 6 in converging pendingapplication of Irving Langmuir Sepositions relatively to one anotheranda 70 rial N o. 729,185, filed July 30,1924 for I-eatnozzle member 7for directing a fan-shaped ing process and ap aratus, whichapplicastreamI of gas across and about the arcing5 vtion is assigned tot e same assignee as the terminals of the electrodes 5 and 6. Thevpresent application. electric holders also constitute means for Whileour invention is well `suited for discharging sheaths of gas about thearcin 75 atomic hydrogen flame welding, many of termina portions of theelectrodes su ported the features of construction thereof are oftherein. The construction of Vthe e ectrode general application to thetype of welding holders is fully described and claimed in apparatuswherein an arc is maintained be- Patent N o. 1,808,541, R. T. Gilletteand E.

tweena plurality of electrodes supported ad- Webster granted June 2,1931, and as- 80 jacent the work, anda welding medium of signed to tliesame assignee as the present any lsuitable. character is supplied to andap lication. about the arc and the work being welded. as is sulied tothese electrode holders It isan object of our invention to providethrough tu 8 and 9. These tubes also a gas-arc torch of improvedconstruction serve as conductors for supplying welding 85 particularlysuited for use in automatic macurrent to the electrodes 5 and 6. Currentchines. is supplied to these tubes by means of con-` Another object ofour invention is to productors 10 and 11, which are attached therevide agas-arc welding torch in which the to by clamps 12 and 13. Tubes 8 and 9terwelding medium is supplied to and about minata in a header' 14 ofinsulatin material 90 the arc in a manner to stabilize its o rato whichgas is supplied throug a valve tion and produce along the line of weding 15. Gas is also supplied to the nozzle 7 a `uniform heat zone.through a valve 16 and tube 17. By reason .A further ob'ect of ourinvention is to of thev connection above described the sup rovide means-ibi' establishing a stable arc ply of gas through electrode holders 3and 4 95 an which will give deep penetration with is controlled by valve15, and the sup 1y reduced values of current and heat. of gas throughnozzle 7 is controlled by v ve Our invention will be better understood16 thereby permitting an independent adfrom the following descriptiontaken in conjustment of these two supplies. 5 nection with theaccompanying drawing in The electrodes 5 and 6 are preferably 100 tutesmeans charged about the arcing termmals o .trated been shown in formedof some e refractory metal such as tun ten and are fed through theelectrode hol ers 3 and 4 by feeding mechanisms 18 and 19 having theconstruction illustrated and described in the application of Harold V.May, Serial No. 540,393, tiled May 27, i931, for a Welding torch, whichapplication is asslgned to the same assignee as the present application.This construction comprises a s crew feeding mechanism by means of whichthe electrodes are fed through their holders when knobs 2O of thefeeding mechanlsm are rotated. The electrode holders are supported inthe relative positions illustnrough the agency of the tubes 8 and 9. Oneof these tubes 9, is rovided with a goose neck by means of whichsulicient resiliency is imparted theretoso that electrode holder 4 maybe moved toward electrode holder 3 in order to bring the electrodes intoengagement for striking the arc. This o eration is accomplished throughan arc stri ing mechanism comprising a bell-crank lever pivoted in thetorch supporting box l by means of a pin 21. One end of thelever, 22,extends out of the box through an opening therein, and the other end ofthe lever, 23, is connected through an insulating member 24 to theelectrode holder 4. An adjustable stop 25 is provided for limiting thesepara tion of the electrodes to the desired amount. This stopAconstitutes a screw member, the end of which engages the end 22 of thebell crank lever above referred to.

The construction of the nozzle members of the above-described torch isillustrated in Fig. 2. The electrode holders 3 and 4 constitute nozzlemembers by means of which sheaths of gas are directed longitudinally ofthe arcing terminal portions of the electrodes extending therethroughand nozzle 7 constifor directing in the pla-ne of the electrodes andacross their arcing terminals a wedge-shaped stream of gas whichdlverlges from a point between these electrodes. he particularembodiment illustrated comprises a plurality of jets 26, 27 and 28, bymeans of w ich a fan-shaped-stream ofgas isf e electrodes. The shapes ofthe jets of gas discharged through the electrode holders 3 and 4 and thenozzle 7 have beeniindica in Figs. 2 and 3 by dotted lines 31. The shapeof the resulting arc flame has also dotted lines 32 in'Fig. 2, 1n thearticular construction illustrated, jets 26, 2 and 28 are 11g of an inchin diameter, and produce a flow of gas which blows the molten arcingterminals I29 'and BOof the electrodes 5 and 6 in divergent directionsas illustrated in Fig. 2. Suilicient gas is supplied through theelectrode holders 3 and 4 to produce a soft ilow ofgas which envelopsthe arcingterminal portions of the electrode holders and protects themfrom the s-ur- -desired position neoeaca rounding latmosphere. Gas at amuch hi her gressure 1s supplied through the -nozz e 7 or a nozzle ofthe dimensions above given,

ressures of about 5 pounds have been used.

his gives a jet of considerable force. In order to prevent the drivingforce of this jet from blowing out the arc, it isv necessary to usevoltages of from 550 to 650 volts. With 650 volts and only 45 to obtainwith a torch of the construction illustrated complete penetration of 1Ainch .metal with filler strip at a speed of 4 inches r minute.

rlhe jet blowing against the electrodes has a direct effect on theposition of the arc fan. The electrodes act as bamesupon which the ietimpinges, and

shapeof 'the electrode ends causes the directionof the arc fan also tochange. By supplying a fan-shaped jet of gas in accordance with ourpresent invention the inside surfaces of the electrodes are kept cleanand the ballsof molten material formed on the ends of the electrodes areblown in the definite illustrated in the drawing.

amperes we are able` the continual change inl rlhe particular shape ofthe jet also acts `to stretch the arc established between the electrodesb exerting thereon a mechanical pressure which forces thearc fanoutwardly and laterall from the arcing terminals of the electro es,thereby) producing an arc of the shape illustrated' ydotted lines 32 inFig. 2 of the drawing'. he welding operation is performed with the arcfan parallel to the direction of travel. In the machine of Fig. l thiswill be from right to left, or left to right.v

Although we prefer to employ the particular construction illustrated anddescribed, other constructions may be employed by means -of which afan-shaped or wedgeshaped stream of gas is directed across and about thearcing terminals of the electrodes.

The use of the torch is not necessarily restricted to automatic arcweldin machines. It is also 'suitable for hand wel i tions in which casethe torch illustrated 1n the drawing will be provided with a suitablehandle by means of which the operator may readily manipulate the torchwhen performing a welding operation.

Other modifications of our invention will occur `to those. skilled inthe art, in view of the Vparticular arrangement above described,

and we therefore aim in the appended claims verging positions relativelyto one another,

and means for directing a fan-shaped stream and scope of our inventionas ng operai of gas across and about the arcing terminals of saidelectrodes.

2. Welding a paratus comprising means yfor holding a plhralityofelectrodes in c011-J verging positions relatively to one another,

and means for directing in the plane of the electrodes and across theirarcing terminals a wedge-shaped stream of gas which diverg froma pointbetween said electrodes.

3. Welding apparatus comprising means for holding a plurality ofelectrodes in converging positions relatively to one another9 means fordirecting sheaths of gas along the arcing terminal portions. of saidelectrodes.'

1' and means for directing in the plane of the electrodes and acrosstheir arcing terminals a wedgeshaped stream of gas which divergesfrom apoint between said electrodes.

4e. `Welding apparatus comprising means for holding a plurality ofelectrodes in converging positions relatively to one another, and meansfor directing in the plane of the electrodes and across their arcingterminals a plurality of jets of gas which diverge from a point betweensaid electrodes.

5. /Velding apparatus comprising means for holding a plurality ofelectrodes in converging positions relatively to one another, means forproducing a sheath of gas about the arcingv terminal portions of saidelectrodes, and means for directing in the plane of the electrodes andacross their arcing terminals a plurality of jets of gas which divergefrom a point between said electrodes.

3 d. Welding apparatus comprising means i for holding a plurality ofelectrodes in converging positions relativel to one another, and meansfor blowing t e ymolten arcing terminals ofk said electrodes indivergent diV rections.

7. Welding apparatus comprising means for holding a plurality ofelectrodes in converging positions relatively to one another, and meansforstretching va welding are established between said electrodes byexerting thereon in the plane of the electrodes a mechanical pressurewhich forces it outwardly and laterally from the arcing terminals ofsaid electrodes.

In witness whereof, we have hereunto set our hands. i

HARRY. W. TOBEY. HAROLD V. MAY.

